Compressed Sensing in Ptychography and Transmission Electron Microscopy

该项目使用压缩传感来改进从由HRTEM图像和衍射图组成的层析数据集中检索对象，并加快数据记录速度，从而减少电子剂量和样品损坏。更具体地说，扫描电子显微镜将在传输中配备快速相位成像，而在瞬变显微镜中将通过近场光刻获得超分辨率。在用越来越复杂的标准样品验证了这些技术之后，我们采用了激光蒸发团簇光源在气相中合成金属和金属氧化物团簇这一具有挑战性的案例。

This project uses compressed sensing to improve object retrieval from ptychographic data sets consisting out of HRTEM images and diffraction patterns, and to speed up data recording and thus decrease electron dose and specimen damage. More specifically, a SEM will be equipped with fast phase imaging in transmission, and super-resolution will be attained in the TEM by near-field ptychography. After having validated the techniques with standard samples of increasing complexity, the challenging case of metal and metal oxide clusters synthesized in the gas phase by laser evaporation cluster sources is taken on.